冤魂

ghost of one who died unjustly / departed spirit demanding vengeance for grievances

injustice / grievance / wrong

old variant of 冤[yuan1]

old variant of 魂[hun2]

soul / spirit / immortal soul, i.e. that can be detached from the body

Black Register of Lost Souls, long novel by Peng Yangou 彭養鷗|彭养鸥 about the destructive influence of opium, published in 1897 and 1909